Patents by Inventor Chih-Hsien Tsai

Chih-Hsien Tsai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220202990
    Abstract: A tissue scaffold for use in a tendon and/or ligament is provided, which includes a weave formed by interlacing warp yarns and weft yarns, wherein the warp yarns include a plurality of fibers with an alternative shaped cross section structure, and the weave includes: a main body area with a bioactive component formed on the fiber surface, and a fixed area comprises the weft yarn having a bioceramic material. The tissue scaffold prepared in the present disclosure has the characteristics of stimulating the growth of tissues and inducing tissue repair, effectively improving the ability of tissue regeneration and bone healing, and is beneficial to the reconstruction of the tendon and/or ligament.
    Type: Application
    Filed: December 29, 2020
    Publication date: June 30, 2022
    Inventors: Hsin-Hsin Shen, Pei-I Tsai, Chih-Chieh Huang, Chien-Cheng Tai, Yi-Hung Wen, Jeng-Liang Kuo, Chun-Hsien Ma, Lih-Tao Hsu, Shin-I Huang, Kuo-Yi Yang, Tsung-Hsien Wu
  • Publication number: 20220209666
    Abstract: The present invention provides a voltage control method for controlling a power supply. The voltage control method comprises the following steps: obtaining a present output voltage value associated with a present gain value; obtaining a predetermined output voltage value associated with a predetermined duty ratio; calculating a target gain value, corresponding to the predetermined duty ratio, according to a gain value formula; performing a weight calculation on the present gain value and the target gain value for generating a buffer gain value; and setting an output voltage command according to the buffer gain value. Wherein the buffer gain value is between the present gain value and the target gain value.
    Type: Application
    Filed: December 27, 2021
    Publication date: June 30, 2022
    Inventors: Szu-Chieh SU, Wei-Chin TSENG, Chih-Hsien WANG, His-Ping TSAI, Wen-Chih CHEN, Guei-Cheng HU
  • Publication number: 20220171266
    Abstract: An illumination system includes a light source providing a first light beam, a first light uniformizing element disposed on a transmission path of the first light beam, a wavelength conversion element, and an optical part. The wavelength conversion element is disposed on the same transmission path and converts the first light beam into a second light beam. The optical part is disposed on a transmission path of the second light beam. The wavelength conversion element is disposed between the first light uniformizing element and the optical part. The second light beam includes a first portion, which is transmitted toward the first light uniformizing element, and a second portion, which is transmitted toward the optical part, reflected by the optical part, and further transmitted and passes through the wavelength conversion element for being transmitted toward the first light uniformizing element. A projection device including the illumination system is also provided.
    Type: Application
    Filed: October 21, 2021
    Publication date: June 2, 2022
    Applicant: Coretronic Corporation
    Inventors: Jyun-Cong Lai, Haw-Woei Pan, Chih-Hsien Tsai
  • Patent number: 11347067
    Abstract: A display system including a display device and a light combining device is provided. The display device includes a first display region and a second display region. The light combining device has a first surface and a second surface opposite to the first surface. At least one part of a first light beam from the first display region is reflected by the first surface to an observing region so as to form a first virtual image. At least one part of a second light beam from the second display region penetrates through the first surface, is reflected by the second surface, penetrates through the first surface again, and is transmitted to the observing region in sequence, so as to form a second virtual image.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: May 31, 2022
    Assignee: Young Optics Inc.
    Inventors: Chih-Hsien Tsai, Chao-Shun Chen
  • Publication number: 20220165866
    Abstract: An HEMT includes a first III-V compound layer. A second III-V compound layer is disposed on the first III-V compound layer. The composition of the first III-V compound layer is different from the composition of the second III-V compound layer. A trench is disposed within the first III-V compound layer and the second III-V compound layer. The trench has a first corner and a second corner. The first corner and the second corner are disposed in the first III-V compound layer. A first dielectric layer contacts a sidewall of the first corner. A second dielectric layer contacts a sidewall of the second corner. The first dielectric layer and the second dielectric layer are outside of the trench. A gate is disposed in the trench. A source electrode and a drain electrode are respectively disposed at two sides of the gate. A gate electrode is disposed directly on the gate.
    Type: Application
    Filed: January 6, 2021
    Publication date: May 26, 2022
    Inventors: Chih-Wei Chang, Yao-Hsien Chung, Shih-Wei Su, Hao-Hsuan Chang, Da-Jun Lin, Ting-An Chien, Bin-Siang Tsai
  • Patent number: 11340418
    Abstract: An optical member driving mechanism is provided. The optical member driving mechanism includes a fixed portion, a movable portion, an electromagnetic driving assembly and an elastic member. The fixed portion has a base and a frame that is disposed on the base. The movable portion is movable relative to the fixed portion, and includes a carrier for carrying an optical member with an incident optical axis. The carrier includes a body and a sidewall that extends along the edge of the body. The electromagnetic driving assembly drives the movable portion to move relative to the fixed portion. The movable portion is movably connected to the fixed portion via the elastic member, wherein as viewed along the incident optical axis, the sidewall and the elastic member at least partially overlap.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: May 24, 2022
    Assignee: TDK TAIWAN CORP.
    Inventors: Chia-Che Wu, Sung-Mao Tsai, Chao-Chang Hu, Che-Wei Chang, Chen-Hsien Fan, Chih-Wei Weng
  • Patent number: 11333847
    Abstract: An optical element driving mechanism is provided, including a movable part for connecting an optical element; a fixed part, wherein the movable part can move relative to the fixed part; a driving assembly for driving the movable part to move relative to the fixed part; and a supporting assembly, wherein the movable part can move relative to the fixed part in multiple dimensions via the supporting assembly.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: May 17, 2022
    Assignee: TDK TAIWAN CORP.
    Inventors: Chao-Chang Hu, Chen-Hsien Fan, Che-Wei Chang, Chih-Wei Weng, Chia-Che Wu, Mao-Gen Jian, Chien-Yu Kao, Sung-Mao Tsai
  • Publication number: 20220018987
    Abstract: The invention provides a projection method and system. The method includes providing a first sensing group sensing a space and generating a first sensing result to determine whether a user is in an entering or exiting state relative to the space; providing a second sensing group sensing a first or second object in the space according to the first sensing result and generating a second sensing result; and generating a prompt information according to the second sensing result and displaying the prompt information. The system includes a first sensing group, a second sensing group, and a display device. The method and system of the invention sense the space according to the entering and exiting state of the user to effectively reduce the inspection steps of the user for the space, thereby effectively improving the safety of the space, and improving the operating convenience of the user of the space.
    Type: Application
    Filed: June 23, 2021
    Publication date: January 20, 2022
    Applicant: Coretronic Corporation
    Inventors: Chi-Tang Hsieh, Chih-Hsien Tsai, Yu-Hsien Wu
  • Publication number: 20210405515
    Abstract: An illumination system, configured to provide an illumination beam, is provided. The illumination system includes a first excitation light source, a wavelength conversion element, and a controller. The first excitation light source is configured to provide a first excitation beam. The wavelength conversion element is located on a transmission path of the first excitation beam. The wavelength conversion element includes multiple wavelength conversion regions and multiple non-wavelength conversion regions. The controller controls whether the first excitation light source emits light. During a first time interval, the controller turns off the first excitation light source. During a second time interval, the controller controls the first excitation light source to emit light. The first excitation beam is transmitted to one of the wavelength conversion regions to form a converted beam. The illumination beam includes the converted beam. Another illumination system and multiple projection devices are also provided.
    Type: Application
    Filed: April 15, 2021
    Publication date: December 30, 2021
    Applicant: Coretronic Corporation
    Inventors: Chi-Tang Hsieh, Chih-Hsien Tsai, Mei-Chun Shih, Wei-Chen Hsiao, Shun-Tai Chen
  • Patent number: 11199765
    Abstract: An illumination system comprises a blue light source, an excitation light source, a first dichroic element and a wavelength converting element. The blue light source provides a blue light beam. An excitation light source provides an excitation beam. The first dichroic element is disposed on transmitting paths of the blue light beam and the excitation beam. The wavelength converting element is disposed on a transmitting path of the excitation beam and adapted to convert the excitation beam into an excited beam. The excitation beam passes through the first dichroic element to the wavelength converting element and converted into the excited beam. The excited beam is transmitted to the first dichroic element and reflected. A wavelength of the blue light beam is greater than a wavelength of the excitation beam, and the blue light source and the excitation light source are disposed on the same side of the first dichroic element.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: December 14, 2021
    Assignee: Coretronic Corporation
    Inventors: Haw-Woei Pan, Chih-Hsien Tsai
  • Patent number: 11153545
    Abstract: A projection device includes an illumination system, a light valve, and a projection lens. The illumination system includes a light source, a lens array, a condenser lens, and a wavelength conversion element. The light source is for providing a light beam. The lens array and the condenser lens are disposed on a transmission path of a light beam. The condenser lens is for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam. The wavelength conversion element is for receiving the condenser light beam and converting at least a portion thereof into a converted light beam. The projection device and the illumination system provided by the invention can effectively improve the conversion efficiency of the wavelength conversion element and prevent the wavelength conversion element from damage, and effectively project the converted light beam generated by the wavelength conversion element.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: October 19, 2021
    Assignee: Coretronic Corporation
    Inventors: Haw-Woei Pan, Chih-Hsien Tsai
  • Patent number: 11126075
    Abstract: A projection device includes: an illumination system providing an illumination beam; a light valve disposed on a transmission path of the illumination beam to modulate the illumination beam into an image beam; and a projection lens disposed on a transmission path of the image beam to project the image beam out of the projection device to form a portrait image. A center of the light valve has a first offset relative to a reference plane in a long side direction of the light valve. The reference plane includes a central axis of the projection lens. The reference plane is perpendicular to the long side direction of the light valve. A center of the portrait image has a second offset relative to the reference plane in a long side direction of the portrait image. The projection device of the invention provides a portrait image with favorable display quality.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: September 21, 2021
    Assignee: Coretronic Corporation
    Inventors: Tai-Ying Su, Chih-Hsien Tsai, Haw-Woei Pan, Sea-Huang Lee
  • Patent number: 11086206
    Abstract: An illumination system, a projection apparatus, and a projection method of the projection apparatus are provided. The illumination system includes an excitation light source, a light combination element, a reflection element, a light wavelength conversion module, and an actuator. The reflection element is disposed on a transmission path of an excitation beam transmitted from the light combination element. The light wavelength conversion module having at least one reflection area and at least one light conversion area is disposed on a transmission path of an excitation beam transmitted from the reflection element. The actuator is coupled to the light wavelength conversion module to shift the light wavelength conversion module relative to the transmission path of the excitation beam transmitted from the reflection element, such that the at least one reflection area and the at least one light conversion area move to the transmission path of the excitation beam transmitted from the reflection element in turns.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: August 10, 2021
    Assignee: Coretronic Corporation
    Inventor: Chih-Hsien Tsai
  • Publication number: 20210063862
    Abstract: A projection device includes: an illumination system providing an illumination beam; a light valve disposed on a transmission path of the illumination beam to modulate the illumination beam into an image beam; and a projection lens disposed on a transmission path of the image beam to project the image beam out of the projection device to form a portrait image. A center of the light valve has a first offset relative to a reference plane in a long side direction of the light valve. The reference plane includes a central axis of the projection lens. The reference plane is perpendicular to the long side direction of the light valve. A center of the portrait image has a second offset relative to the reference plane in a long side direction of the portrait image. The projection device of the invention provides a portrait image with favorable display quality.
    Type: Application
    Filed: July 27, 2020
    Publication date: March 4, 2021
    Applicant: Coretronic Corporation
    Inventors: Tai-Ying Su, Chih-Hsien Tsai, Haw-Woei Pan, Sea-Huang Lee
  • Publication number: 20210041776
    Abstract: The present invention provides a lighting system and a projection device. The lighting system includes a first laser source module providing a first laser beam, a second laser source module providing second and third laser beams, a wavelength conversion module, first and second light splitting units. The first laser beam, the second and third laser beams are respectively emitted from the first and second laser source modules along a first direction. The first laser beam is converted into an excited beam by the wavelength conversion module. The first and second light splitting units are substantially non-parallel, and the excited beam, the second and third laser beams form a lighting beam by one of the first and second light splitting units. The lighting system and the projection device provided by the present invention are small in size and simple in optical path design.
    Type: Application
    Filed: July 22, 2020
    Publication date: February 11, 2021
    Applicant: Coretronic Corporation
    Inventors: Chih-Hsien Tsai, Mei-Chun Shih
  • Publication number: 20200351480
    Abstract: A projection device includes an illumination system, a light valve, and a projection lens. The illumination system includes a light source, a lens array, a condenser lens, and a wavelength conversion element. The light source is for providing a light beam. The lens array and the condenser lens are disposed on a transmission path of a light beam. The condenser lens is for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam. The wavelength conversion element is for receiving the condenser light beam and converting at least a portion thereof into a converted light beam. The projection device and the illumination system provided by the invention can effectively improve the conversion efficiency of the wavelength conversion element and prevent the wavelength conversion element from damage, and effectively project the converted light beam generated by the wavelength conversion element.
    Type: Application
    Filed: April 15, 2020
    Publication date: November 5, 2020
    Inventors: HAW-WOEI PAN, CHIH-HSIEN TSAI
  • Patent number: 10824068
    Abstract: The invention discloses a phosphor wheel, and a projector using the phosphor wheel. The projector includes an illumination system, a light valve, and a projection lens. The illumination system is used to provide an illumination beam. The light valve is disposed on a transmission path of the illumination beam and converts the illumination beam into an image beam. The projection lens is disposed on a transmission path of the image beam. The illumination system includes an excitation light source and a phosphor wheel. The excitation light source is used to provide an excitation beam to the phosphor wheel. The phosphor wheel includes a motor, a disk plate, a reflection member, and at least one phosphor layer. The motor has a shaft. The disk plate is connected to the shaft. In the invention, the phosphor wheel has better reliability and rigidity, and has the effect of enhancing heat dissipation.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: November 3, 2020
    Assignee: Coretronic Corporation
    Inventors: Chi-Tang Hsieh, Haw-Woei Pan, Pi-Tsung Hsu, Chih-Hsien Tsai
  • Patent number: 10824069
    Abstract: A projection apparatus and an illumination system thereof are provided. The illumination system includes a light source device, a light homogenization device, an optical transmission module, and an optical wavelength conversion module. The light homogenization device is disposed on a transmission path of a light source beam from the light source device. The optical transmission module is disposed on a transmission path of the light source beam from the light homogenization device. The optical wavelength conversion module is disposed on a transmission path of the light source beam from the optical transmission module and is configured to convert a first portion of the light source beam into a converted light beam. The converted light beam and a second portion of the light source beam form an illumination light beam. The light homogenization device is disposed outside a transmission path of the illumination light beam.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: November 3, 2020
    Assignee: Coretronic Corporation
    Inventor: Chih-Hsien Tsai
  • Patent number: 10824062
    Abstract: The disclosure relates to an illumination system, a projection device and an illumination control method. The illumination system includes a first sensor, a second sensor and a control module. The first sensor receives a part of an excitation beam and a part of at least one converted beam scattered by a wavelength conversion module, so as to generate a first photoelectric signal. The second sensor receives a part of a first set of color light and a part of a second set of color light scattered by a filter module, so as to generate a second photoelectric signal. The control module generates a synchronization signal based on relative intensity changes of the first and second photoelectric signals. The synchronization signal is to synchronize the wavelength conversion module with the filter module, and the first set of color light and the second set of color light sequentially form an illumination beam.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: November 3, 2020
    Assignee: Coretronic Corporation
    Inventors: Chih-Hsien Tsai, Haw-Woei Pan, Yi-Hsuang Weng
  • Patent number: 10816885
    Abstract: An illumination system, a projection apparatus, and a projection method of the projection apparatus are provided. The illumination system includes an excitation light source, a light combination element, a light wavelength conversion module, and an actuator. The light combination element is disposed on a transmission path of an excitation beam emitted from the excitation light source. The light wavelength conversion module is disposed on a transmission path of the excitation beam transmitted from the light combination element and has a plurality of optical areas. The actuator is coupled to the light combination element to change a rotation angle of the light combination element, such that the excitation beam transmitted from the light combination element is transmitted to the plurality of optical areas of the light wavelength conversion module via different transmission paths.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: October 27, 2020
    Assignee: Coretronic Corporation
    Inventor: Chih-Hsien Tsai